方ｘ １２＋３ｘ＝－４－５ｘ ｘ＝？
回答 (5)
2007-08-04 10:52 pm
✔ 最佳答案
１２＋３ｘ＝－４－５ｘ１２＋４＝－５ｘ－３ｘ
１６＝－８ｘ
ｘ＝－２
2007-08-05 6:57 pm
12 + 3x = -4 - 5x
3x + 5x = -4 - 12
8x = -16
x = -2
3x + 5x = -4 - 12
8x = -16
x = -2
2007-08-04 10:55 pm
１２＋４＋３ｘ＝－５ｘ
１６＝－５ｘ－３ｘ
１６＝－８ｘ
ｘ＝－２
１６＝－５ｘ－３ｘ
１６＝－８ｘ
ｘ＝－２
2007-08-04 10:53 pm
12 + 3x = -4 - 5x
12 + 3x + 5x = - 4 - 5x + 5x
12 + 8x = -4
12 + 8x - 12 = -4 - 12
8x = -16
8x / 8 = -16 / 8
x = -2
12 + 3x + 5x = - 4 - 5x + 5x
12 + 8x = -4
12 + 8x - 12 = -4 - 12
8x = -16
8x / 8 = -16 / 8
x = -2
參考: Myself~~~
收錄日期: 2021-04-13 14:05:53
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070804000051KK02568